Earlier this fall, the world’s top climate scientists gave humanity about 10 years to avoid a future that really sucks. With the midterm elections right around the corner, that warning means voters are effectively deciding which candidates to trust with the keys to the climate. If voters are sufficiently worried about warming, that anxiety might help determine who is put in office.

According to Anthony Leiserowitz, director of the Yale Program on Climate Change Communication, worry is a stronger predictor of policy support than other emotions. “We found that it’s not fear, it’s not anger, and it’s not disgust or guilt,” he explained. “Worry doesn’t hijack, doesn’t overwhelm rationality. It can really spur it.”

So just how worried about the planet’s future are voters in the nation’s tightest congressional races? Grist created a map overlaying competitive elections, as identified by the Cook Political Report, with climate-concern data from Yale’s 2018 Climate Opinion Maps. (This map is based on up-to-date data at the time of publishing.)

These toss-up elections are spread throughout the country. Some are sprawling rural districts; others are comprised primarily of dense cities or metro areas. (Keep in mind that congressional districts vary in size, but each district holds roughly the same number of people.) Each district varies in what percentage of its constituents report being worried about climate change—represented from yellow (not that worried) to red (pretty worried).

Interestingly, even in those districts where folks seem less concerned about climate change, a majority of people worry about it. Most of the seats in play are currently held by Republicans. And while several Democrats have doubled down on environmental policies, like renewable energy, climate change is a bipartisan issue in many of these communities.

Look closely at the map, and you’ll see a handful of neck-and-neck races in places chock-full of climate worriers. These communities range from the beaches of Miami and Southern California to the suburbs of Houston. Grist examined five of these highly climate-concerned toss-up districts to see what local factors may shift the balance of power in Congress.

California’s 48th District (67 Percent of Residents Are Worried)

California’s 48th Congressional District includes much of coastal Orange County, and the local midterms are about as melodramatic as an episode of The O.C.

Republican Dana Rohrabacher has represented this affluent, conservative bastion in a deep-blue state since 1989, but his seat is in play due in part to a few recent scandals: He had more than one clandestine meeting with Mariia Butina, the former NRA darling arrested on suspicion of Russian espionage and election interference. That’s landed him on the radar of the Mueller investigation—and in hot water with voters. “They call me Putin’s best friend,” he told ABC last year. “I’m not Putin’s best friend.”

But even Republicans who deny Russian entanglements can’t get away with denying climate change in this sea-level community. The district’s stunning coastlines—from Huntington Beach to Laguna Beach—could see chronic flooding by 2030. That science isn’t lost on homeowners in the area, says Ray Hiemstra, co-chair of the Sierra Club’s Angeles Chapter Political Committee. “They’re actually starting to think, ‘Maybe I should start thinking of selling my place.’ ”

Rohrabacher says he supports solar and nuclear energy as well as expanding oil and gas production. The staunch Trump supporter has stated in the past that offshore drilling is safer than importing oil on tankers, pointing to incidents such as the 1990 American Trader spill. In contrast, his opponent, Democratic candidate Harley Rouda, says he’ll promote clean energy while pushing back on offshore-drilling efforts.

Florida’s 26th district (67 Percent Are Worried)

The tides are already lapping at the door in the low-lying Florida Keys. Within the century, scientists predict that much of South Florida could be underwater.

It’s no wonder that residents in Florida’s 26th Congressional District—the state’s southernmost region, which includes all three of its national parks as well as part of Miami-Dade County—are some of the Americans who are most concerned about climate change in the nation. Almost 70 percent of its constituents are Hispanic, most of them Cuban American. Polls show that Latinos consistently want climate action more than the population at large.

The seat is one of the top 10 House races to watch in 2018, according to Politico. But the 26th District is a special place where both candidates running for the House seat—including the Republican—have explicitly backed climate action.

Those of us who truly care about #climatechange must be sober when discussing its connection to #HurricaneMichael or any other storm. Florida has had hurricanes for centuries. There’s no time to waste, but alarmists hurt the cause & move our fight for #climatesolutions backward

One week out from the election, the race is narrowing. And Democratic challenger Debbie Mucarsel-Powell, a former associate dean at Florida International University, has made the environment a key component of her political ads.

Texas’ 7th District (65 Percent Are Worried)

The Texas 7th is affluent, well-educated, largely residential—and, as a result of Hurricane Harvey, still recovering from being underwater for a chunk of 2017.

Republican John Culberson has represented Texas’ 7th since 2001. As he faces a tough re-election campaign this year against Democratic challenger Lizzie Pannill Fletcher, he’s largely avoided talking about climate change, including declining an invitation in January to a community climate forum held in his district. While he has eschewed those exact words during his re-election bid, Rep. Culberson has used last year’s hurricane as a major talking point, name-dropping the storm in more than half of his emails to voters this year.

“He hasn’t been one of the snowball throwers calling climate change a hoax,” said Daniel Cohan, an environmental engineering professor at Rice University. “But he takes a wait-and-see attitude, falsely indicating that the science isn’t clear.”

For a district that’s borne the brunt of so many environmental disasters, it’s unclear how much sway climate change will have over the results of this race. According to Mark Jones, a political scientist at Rice University’s Baker Institute for Public Policy, there may not be enough swing voters in the Texas 7th who care about the issue. Those who do care already know how they’re voting. But, Jones adds, there are “not an insignificant number” of voters who are still grappling with Harvey and could be potentially influenced by talk of climate policy.

Texas’ 32nd district (65 Percent Are Worried)

Texas has a lot of skin in the game when it comes to climate change. A National Oceanic and Atmospheric Administration scientist once dubbed the state “the disaster capital of the United States” for its unique meteorological conditions.

At least for now, climate politics in the 32nd—which is more affluent than much of the state — are traditionally partisan. Pete Sessions, the incumbent Republican who’s represented the district (and its previous incarnation, District 5) since 1997, has a lifetime score of 2 percent from the League of Conservation Voters, indicating a strong anti-environment record.

Sessions’ main opponent, Democrat Colin Allred, is an ex–football player and civil rights attorney whose main focus is on reducing voter disenfranchisement. His environmental platform states he believes in promoting investment in renewable energy, “rejoining” the Paris climate accord, and defending the independence of the EPA and NOAA.

New Jersey’s 7th district (64 Percent Are Worried)

New Jersey’s 7th Congressional District stretches from the western suburbs all the way to the banks of the Delaware River. Not only does the river serve as the water supply for more than 15 million Americans, but it’s also a source of considerable climate worry for constituents.

Polluted runoff finds its way into waterways, which adds to the district’s rising rivers, damaging families, homes, and businesses. Climate change–related flooding threatens the quality of life across the district, according to Ed Potosnak, executive director of the New Jersey League of Conservation Voters. “That’s where lack of action by Congress has left families vulnerable,” he told Grist.

New Jersey is the most densely populated state in the U.S., and the district runs the socio-economic gamut, with a mix of suburban, exurban, and rural communities.

Lance’s opponent, Democrat Tom Malinowski, is new to New Jersey, but not to politics. He served as assistant secretary of state for democracy, human rights, and labor under President Obama. According to the League of Conservation Voters, he has dedicated his career to people’s rights to breathe clean air and drink clean water. Like his opponent, Malinowski has stated he believes that humans are exacerbating climate change. He has promised to oppose pipelines that will run across the state and has spoken out against offshore drilling.